3.Frequency response: 20Hz-20KHz4.Sensitivity: 80db±2db5.SNR: ≥80db6.Distortion: ≤0.3% 7.fade-in fade-out function , to protect the speaker from demage8. memory store last song when power off9. Support any capacity TF card & U disk10.rechargable and replaceable lithium battery, 2350mA battery! It can play movie about 5 hours, play music more than 10 hours!

Shenzhen Shengchuang Electronics Co., Ltd. was established in 2001. We specialize in the OEM manufacture of computer peripherals. Our researching and development department has possessed a group of elites with long-years experience in developing new products. We have successfully developed many sorts of products including PC cams and mice. We sincerely hope to establish business relations hand in hand for a prosperous future.